car overheating can't trace problem

[abunawas]

hi guys, my ride a Wira 4G15, lately have some overheating problems that i cant seem to find the cause.

it only happens after the car is run for more than 1 hour, fan everythign normal, then suddenly fan wont turn and temperature go up.

i have changed new radiator, new thermostat, new sensor switch, new radiator fan motor but problem still there. water pump also brand new high quality item.

engine is all stock standards carburatorr

any bro experience this before? the fan just wont turn after a certain period. i cant seem to find the problem.

engine seems ok all the while no makan miyak hitam

wiring?

need to open head?? :stupid:

---------- Post added at 03:51 PM ---------- 6 hour anti-bump limit - Previous post was at 03:50 PM ----------

fan relay problem?

sighhhhh

hope no need to open head gasket

 

[DanzEterna]

try direct wiring for the fan.

 

[abunawas]

try direct wiring for the fan.

will that cause the fan to be running all the time?

actually the fan motor get signal to turn from the thermostat?

sigh confused

 

[KRZ8v]

Running too Lean or Engine head warp?

 

[abunawas]

Running too Lean or Engine head warp?

hmmm...i not sure also.....maybe head....carb never been touched the setting for years

 

[DanzEterna]

will that cause the fan to be running all the time?

actually the fan motor get signal to turn from the thermostat?

sigh confused

yes. but 1st try to check your thermosthat & the wiring......
happened to my kancil previously.

 

[abunawas]

Running too Lean or Engine head warp?

how would those cause the fan not to turn after a certain period?

if head warp sure overheat oredy, no?

---------- Post added at 04:08 PM ---------- 6 hour anti-bump limit - Previous post was at 04:07 PM ----------

yes. but 1st try to check your thermosthat & the wiring......
happened to my kancil previously.

ok thanks. how u fix the kancil prob?

 

[KRZ8v]

Tuning can lari overtime if I m not mistaken.

 

[abunawas]

ok.

i dont think head gasket problem becoz radiator always full, the expansion tank also same no problem.

also when i cruise on highway no traffic jam temp very good. just that the stupid fan not pusing

 

[jun_ng_1208]

ok.

i dont think head gasket problem becoz radiator always full, the expansion tank also same no problem.

also when i cruise on highway no traffic jam temp very good. just that the stupid fan not pusing

Happened to my Myvi few weeks ago too...its due to the worn out motor for the radiator fan, changing the motor solve the problem :)

 

[penagihdadih]

ok.

i dont think head gasket problem becoz radiator always full, the expansion tank also same no problem.

also when i cruise on highway no traffic jam temp very good. just that the stupid fan not pusing

start engine and open radiator cap, if there are bubbles then the head gasket warp.
if everything okay with your cooling system then u need to check the fan system. try to change the relay switch first, afraid the relay is season and cant working when its heated. Iv problem with head lamp relay before, it will stop working after few hours of driving.

 

[ixeo]

Happened to my Myvi few weeks ago too...its due to the worn out motor for the radiator fan, changing the motor solve the problem :)

Worn out motor will still spin but slower? Air con not so cold?

 

[abunawas]

start engine and open radiator cap, if there are bubbles then the head gasket warp.
if everything okay with your cooling system then u need to check the fan system. try to change the relay switch first, afraid the relay is season and cant working when its heated. Iv problem with head lamp relay before, it will stop working after few hours of driving.

no bubbles. ok i check the relay switch.

my aircond very cold.

 

[DanzEterna]

there was something wrong with the thermosthat wiring, the fan did not turn.....

 

[sukam05]

...it also happen to my iswara...changed new fan/radiator,sensor switch...
...temporarily I just do direct fan....no choice...
..my foreman ask me to check sensor switch for radiator becoz different radiator, different sensor switch ...